Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details Textual)

v3.8.0.1
Subsequent Events (Details Textual) - USD ($)
12 Months Ended
Jan. 12, 2018
Jul. 14, 2017
Dec. 31, 2017
Mar. 21, 2018
Jan. 31, 2016
Subsequent Event [Line Items]          
Payments for Repurchase of Preferred Stock and Preference Stock   $ 4,092,153      
Stock Repurchased During Period, Shares   120,000 2,800,000    
Line of Credit Facility, Maximum Borrowing Capacity     $ 30,000,000   $ 7,500,000
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Payments for Repurchase of Preferred Stock and Preference Stock $ 9,100,000        
Payments of Dividends 900,000        
Subsequent Event [Member] | Letter of Credit [Member]          
Subsequent Event [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity 5,000,000     $ 8,000,000  
Subsequent Event [Member] | New Term Loan [Member]          
Subsequent Event [Line Items]          
Debt Instrument, Face Amount 10,000,000        
Debt Instrument, Periodic Payment, Principal $ 250,000        
Subsequent Event [Member] | Base Rate [Member] | Up to Six Months [Member]          
Subsequent Event [Line Items]          
Debt Instrument, Basis Spread on Variable Rate 4.00%        
Subsequent Event [Member] | Base Rate [Member] | Six Months to Twelve Months [Member]          
Subsequent Event [Line Items]          
Debt Instrument, Basis Spread on Variable Rate 4.50%        
Subsequent Event [Member] | Base Rate [Member] | From Twelve Months [Member]          
Subsequent Event [Line Items]          
Debt Instrument, Basis Spread on Variable Rate 5.00%        
Subsequent Event [Member] | Eurodollar [Member] | Up to Six Months [Member]          
Subsequent Event [Line Items]          
Debt Instrument, Basis Spread on Variable Rate 5.00%        
Subsequent Event [Member] | Eurodollar [Member] | Six Months to Twelve Months [Member]          
Subsequent Event [Line Items]          
Debt Instrument, Basis Spread on Variable Rate 5.50%        
Subsequent Event [Member] | Eurodollar [Member] | From Twelve Months [Member]          
Subsequent Event [Line Items]          
Debt Instrument, Basis Spread on Variable Rate 6.00%        
Preferred Class A [Member] | Subsequent Event [Member]          
Subsequent Event [Line Items]          
Stock Repurchased During Period, Shares 280,000